Whole Pizza
Circular shape with radius 7 inches
We need to find the circumference. Let's use the formula and find the circumference:
[tex]\begin{gathered} C=2\pi r \\ C=2\pi(7) \\ C=14\pi \end{gathered}[/tex]Half Eaten Pizza
Has radius 20 inches.
We will use the formula for the circumference of a circle and halve it to find circumference of half circle.
Shown below:
[tex]\begin{gathered} C=\frac{2\pi r}{2} \\ C=\pi r \\ C=20\pi \end{gathered}[/tex]The second pizza (half eaten pizza) has a greater circumference.
